Universal joint.



E. J. TIRRELL.

UNIVERSAL JOINT. APPLICATION FILED 1320,28, 1912.

1,112,869m Patented 0015.631914.

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ETWLIRJ) J'. TIRRELL, 0F FLINI, MCHIGAN.

UmvnnsAL Joins.

Specification of Letters Patent.

Patented Got. 6, 1914.

implication led. December 28, 1912. Serial No. 739,162.

ZZ whom 'it muy concern,

it lniown that l, .EDWARD J. TIRRELL, tillen of the United States,residing at Wirt. in the coinity of Genesee and State of hi an, haveinvented certain new and improvements in Universal Joints, lich thefollowing; is a specification. invention coinpi'elicnds improvements inuniversal joints and more particu- 'jjj larzly those of the type whichare especially for use as shaft couplings.

.l nrirnary object of the invention is to `ot-ovl joint of this naturein which tivo slrlts may readily adjust themselves longitudinally andalso be capable of a slight angular adjustment.

A. more specilic object of the invention is to provide a universal jointincluding a,

casing' having a plurality of pins secured la therein for engagement hya shaft.

The inii'cntion also aims to generally improve unirersal joints of thisnature to render them more .oiul and commercially desire-hic.

4ilfiuththese and other objects in view, as will hecolnc more apparentas `the description proceeds, the .invention consists in certain nove-lfeatures of construction, combination, and arrangement of parts, as willbe an he i latter descrilocil. and. claimed.

lor a complete 'mulerst-anding of my ini., reference is to he had to thefollowdescription and accompanying draw: t. :in which, l

'igurc 1 is a side elevation of my innon, Fig. .is a longitudinalsectional miv through the saine, tal-:en upon thc in of line dvi).:i-iFig. Fig. 3 is an elcci' one cud oi: one of the shafts, Fig. a.rich' similar to Fig. Q, showing` y modified pins, Fig. 5 is atransverse vier; throt jh the forni of .my dei sioivn in lfigg... 1 and2, Figs. G and 7 are detail jiierspective views of various .11a forms ofpins capable of use with my invention. r

the following description and accomdrafwings, similar parts will be rc'il. to and designated loy like characters ai reference.

rriug;r detail. to the drawings by ils, designates a 'portion of a shafti end enlarged, as at 11 and reat ci inner The 'wall l1 of the cylin-,tl chamber 1i?, is formed with a plu- '.i forni the cylindrical endopening` rality of openings 13, which extend entirely.

through said wall to receive the pins 14. As clearly shown in Fig. 5,these pins are positioned so as to forni an essentially triangularframe. The ends of said' pins are supported bythe walls of the openings13, which o enings 'forin'thc reduced. portions 15, whicli areessentially triangular in cross section. The pins 14 terminate short ofthe periphery of the wall 11 and have their inner faces flattened, as'clearly shown in Fig. 7. A shaft 16 projects .into the charnber betweenthe pins ll and has its periphery recessed to form three flattenedsurfaces 17 for engagement with the o posed faces of the pins let. Itwill be note upon reference to Fig. 2, that said recesses forni`shoulders 18,` which are adapted to engage the pins 14 and thus linutthe longitudinal movement of the two shafts relative to each other. Asclearly shown in Fig. 5, the fiattened portions 1.7 are spaced a slightdistance from the pins 1i so as to allow the shaft 1G a slight angularplay relativeV to the shaft- 10. v i

A dust `guard 19 encircles the enlarged portion 11 of the shaft 10. andis formed upon its outer end with an inwardly projecting flange 19',which serves to hold a preferably felt washer .20 against the end of theshai' t l0. so as to protect the parts within the chamber 12 from dustand other foreign matter. A fell* ringl 21 is seated within an annularrecess seated in the periphery of the enlarged portion 11 and ongagcsthe inner side of the guard `19. If desired, liat metal springs may bcplaced within the outer cni'ls of the openings 13' soas to hear againstthe ends of the pins 14 and restrict to a certain extent theirlongitudinal movement.

lt will lio noted that the construction heretofore described provides ashaft coupling or universal joint in which the two shafts may beadjusted longitudinally and also anguiarly to a slight extent. Thefiattencd portions of the pins 1i, by bearing against the flattenedsurfaces 17 will transmit the rotational movement of the shaft 10 to theshaft 1G. The slight play rovided hy having` the'4 flattened surfaces lof the shaft 16 spaced a slight distance from the pins permits a limitedangularl adjustment of the two shafts. i

ln Fig. 11, I have shown pins 23, which are cylindrical fortheir entirelength. These

